Will test with another sd card but this one has been working for me the last 3 or four years, its class 10 and im pretty sure its not damaged, i use recalbox 7.1.1 on it and simply if i dont touch that particular setting everything works fine, but i will try a fresh install on another and report back.
I understand, but some users said exactly the same thing: the SD card didn't seem to be a problem, but testing with another SD Card the problem didn't happen again.
It may not be the case, but I believe that testing is the best way to find out.
As for the input /output i dont understand what i have to do.. do you mean replacing the hdmi cable?
I was referring to the output (I already edited the post, I said "input" wrongly...), the Rpi4 has 2 MicroHDMI ports:
But ... Testing with another microHDMI to HDMI adapter or with another HDMI cable is also useful, so it would rule out all possibilities.
Sorry im not native english speaker..
Me neither, don't worry about it.
Thank you very much for your answer. I'll try using the other microhdmi port as buying another cable is out of my possibilities right now.
I can test another sd card also.